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Search results 51 - 60 of 278 matching essays
- 51: Nuclear Power
- ... manner that isolation from the biosphere is assured until they have decayed to innocuous levels. If this is not done, the world could face severe physical problems to living species living on this planet. Some atoms can disintegrate spontaneously. As they do, they emit ionizing radiation. Atoms having this property are called radioactive. By far the greatest number of uses for radioactivity in Canada relate not to the fission, but to the decay of radioactive materials - radioisotopes. These are unstable atoms that emit energy for a period of time that varies with the isotope. During this active period, while the atoms are 'decaying' to a stable state their energies can be used according to the ...
- 52: Nuclear Power
- ... manner that isolation from the biosphere is assured until they have decayed to innocuous levels. If this is not done, the world could face severe physical problems to living species living on this planet. Some atoms can disintegrate spontaneously. As they do, they emit ionizing radiation. Atoms having this property are called radioactive. By far the greatest number of uses for radioactivity in Canada relate not to the fission, but to the decay of radioactive materials - radioisotopes. These are unstable atoms that emit energy for a period of time that varies with the isotope. During this active period, while the atoms are 'decaying' to a stable state their energies can be used according to the ...
- 53: How Batteries Work
- ... consists of a mixture of ammonium chloride and zinc chloride made into a paste. This sits in between the negative and positive electrodes, which acts as an ionic conductor. When the cell is in use, atoms of the Zinc in the outer case are oxidized, giving up electrons and forming zinc ions. The electrons are lost by the zinc atoms then flow through the load (the device being powered) and supply energy. They re-enter the cell at the carbon rode that serves as the positive electrode. As this series of events happen, the battery begins to lose pure zinc atoms, and the battery starts to die. This type of cell gives about 1.5 volts of energy. By connecting many cells in a series a rather high voltage can be produced. Another type of ...
- 54: Chemistry Investigation
- ... collision theory is used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another. Not all collisions, however, bring about chemical change. A collision will be effective in producing chemical change only if the species brought together possess a certain minimum value of internal energy, equal to the activation energy of the reaction. Furthermore, the colliding species must be oriented in a manner favourable to the necessary rearrangement of atoms and electrons. Thus, according to the collision theory, the rate at which a chemical reaction proceeds is equal to the frequency of effective collisions. Because atomic or molecular frequencies of collisions can be calculated with ... collision theory is used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another. Not all collisions, however, bring about chemical change. A collision will be effective in producing chemical change only if the species brought together possess ...
- 55: Static Electricity
- ... to the understanding of electricity. A third idea was that if the distance between electric charges is increased, the force of attraction or repulsion decreases. All matter is made up of very tiny particles called atoms. Atoms are made up of even smaller substances called subatomic particles. Scientific studies have found that some of these subatomic particles are charged with electricity. The electric charges are made up of two kinds - positive and ... some substances that conduct little or no electricity. They are called insulators. Some common insulators are amber, glass, plastic, rubber, and dry wood. The behavior of conductors and insulators can be easily explained. In some atoms, electrons in the outermost orbits are held loosely, and can be easily set free. They are called free electrons. Materials made up of these kinds of atoms have many free electrons, which makes them ...
- 56: Quantum Computing
- ... utilizing nanotechnology will be very small or microscopic. These machines will have potential applications in many fields such as medicine, computing and the fabrication of new and exotic materials. Quantum technologists can already trap individual atoms and experiment with them. "Quantum technologists can bounce atoms up and down on cunningly sculpted electromagnetic fields, produce atomic graffiti by displacing single atoms on a material surface, and display the structure of a crystal atom by atom. (Benjamin)" These experiments probe the deep quantum regime, where Heisenberg's uncertainty principle and other aspects of quantum outlandishness significantly ...
- 57: Chemical Bonding
- ... world. In bonds, elements are held together and form compounds that may have new physical and chemical properties. There are two main kinds of bonds, they ionic and covalent. In bonding the goal of the atoms involved is to reach a level of stability with less energy. In order to reach the epitome of stability, as in the case of noble gases, an atom strives to complete its outer shell. Either losing or gaining electrons may do this, which concludes in an ionic bond or the sharing of electrons with other atoms which makes a covalent bond. Ionic bonds, as you can probably surmise form from ions. Ions are made when an atom gains an electron to form a negative ion or loses an electron to form ... Na. First, we must understand that there is an attraction between them because one is positive and the other negative and that the Cl atom contains seven valence electrons and Na one. So, as the atoms bond the Na loses its valence electron and Cl gains it making its outer shell complete and it more stable. During this reaction light and heat are given off. This shows an exothermic reaction, ...
- 58: Radioactive Wastes
- ... manner that isolation from the biosphere is assured until they have decayed to innocuous levels. If this is not done, the world could face severe physical problems to living species living on this planet. Some atoms can disintegrate spontaneously. As they do, they emit ionizing radiation. Atoms having this property are called radioactive. By far the greatest number of uses for radioactivity in Canada relate not to the fission, but to the decay of radioactive materials - radioisotopes. These are unstable atoms that emit energy for a period of time that varies with the isotope. During this active period, while the atoms are 'decaying' to a stable state their energies can be used according to the ...
- 59: Plutonium
- ... discovery. Its name came from Pluto, the planet after Neptune for which Neptunium was named. In 1940, at the University of California at Berkeley, he bombarded a sample of Uranium with deuterons, the nuclei in atoms of deuterium, transmuting it into plutonium. Shortly after, Seaborg was able to isolate plutonium 239, an isotope used in atomic bombs. Plutonium is a highly dangerous and poisonous element because it rapidly gives off radiation ... plutonium atom is split into two nearly equal parts, and energy is released. Although the energy released by one atom is not much, the splitting of the nucleus releases more neutrons, which strike more plutonium atoms. This process, called a chain- reaction, produces enormous amounts of energy. This energy is often used to power nuclear reactors, or to provide the energy for nuclear weapons. Although Pu-239 is such an efficient ... a waste with a half-life of around 24,100 years is produced. Another large problem for scientists creating power with plutonium is actually getting the chain-reaction to work. Often, only the first few atoms struck by the deuterons convert to Plutonium. Unfortunately for the scientists, the whole problem is a matter of probabilities and chance. There are four factors that determine whether the reaction occurs. They are 1) ...
- 60: Alkanes
- Alkanes The alkanes are the simplest form of organic compounds. They are made up of only Carbon atoms and Hydrogen atoms. All of the bonds are single and the number of hydrogen atoms versus carbon atoms follows this formula: CnH2n+2 Alkanes are all non-polar molecules so they aren't soluble in water. Here are some more facts. -Referred to as "Saturated" -They have -low densities - ...
Search results 51 - 60 of 278 matching essays
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